EP2317282B1 - Dispositif d'affichage de carte et procédé d'affichage de carte - Google Patents

Dispositif d'affichage de carte et procédé d'affichage de carte Download PDF

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Publication number
EP2317282B1
EP2317282B1 EP10169810.8A EP10169810A EP2317282B1 EP 2317282 B1 EP2317282 B1 EP 2317282B1 EP 10169810 A EP10169810 A EP 10169810A EP 2317282 B1 EP2317282 B1 EP 2317282B1
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European Patent Office
Prior art keywords
road
display
map
street name
displayed
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EP10169810.8A
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German (de)
English (en)
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EP2317282A3 (fr
EP2317282A2 (fr
Inventor
Kazuomi Chiba
Yukio Sato
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Alpine Electronics Inc
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Alpine Electronics Inc
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Publication of EP2317282A2 publication Critical patent/EP2317282A2/fr
Publication of EP2317282A3 publication Critical patent/EP2317282A3/fr
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
    • G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
    • G01C21/34—Route searching; Route guidance
    • G01C21/36—Input/output arrangements for on-board computers
    • G01C21/3667—Display of a road map
    • G01C21/3673—Labelling using text of road map data items, e.g. road names, POI names

Definitions

  • the present invention relates to a map display device and a map display method, and more particularly to a map display device and a map display method that have a function for displaying a street name at an optimal position in accordance with a road width.
  • a typical on-vehicle navigation device of related art includes a control device, such as a CPU, that controls all processing related to navigation; a storage device, such as a digital versatile disk read only memory (DVD-ROM) or an integrated circuit (IC) memory card, that previously stores map data; a display device; a global positioning system (GPS) receiver; and detectors, such as a gyro and a vehicle speed sensor, that detect a current position and a current azimuth of a vehicle.
  • the control device reads map data including the current position of the vehicle from the storage device.
  • the control device causes the display device to display a map image around the vehicle position on a screen of the display device by using the map data.
  • control device causes the display device to display a vehicle position mark indicative of the current position of the vehicle in a superposed manner on the map image, so that the map image is scrolled to follow travel of the vehicle, or the map image is fixed to the screen and the vehicle position mark is moved.
  • the on-vehicle navigation device typically has a guide function (route guide function) for allowing the user to easily travel to a destination without traveling on a wrong road.
  • route guide function the CPU uses the map data and searches an optimal route from a departure place (normally, a current position of the vehicle) to a destination by simulation of, for example, breadth-first search or Dijkstra's algorithm.
  • the searched route is stored as a guide route and the guide route is displayed on a map image during traveling such that the guide route can be distinguished from the other roads (for example, by changing the color or line width of the guide route).
  • a guide view of the intersection (for example, an enlarged view of the intersection, an arrow indicative of a travel direction of the vehicle at the intersection, a distance to the intersection, and an intersection name) is displayed on the map image.
  • the user can recognize which road the user travels, and which direction the user travels ahead at the intersection.
  • Roads and facilities are displayed on the map image of the on-vehicle navigation device in accordance with map data. Also, names of the roads and facilities are displayed on the map image. Accordingly, the user can easily recognize the road and the position on the road where the vehicle currently travels, and facilities around the vehicle.
  • the names When the names are displayed, if the density of the names to be displayed varies depending on the scale of the map, the names may overlap one another, or the name of a facility may overlap another facility. The user may have difficulty in viewing the map, or the user may not effectively use the map.
  • Japanese Unexamined Patent Application Publication No. 05-061405 describes a technique that previously determines names to be displayed in accordance with a display scale, and displays character strings indicative of the names with a uniform size regardless of the display scale.
  • Japanese Unexamined Patent Application Publication No. 07-168524 describes a technique that reads position coordinate information indicative of a display position of a character or a symbol on a map, and font information, from a storage location different from a storage location of map data, and displays the character or symbol without changing the size even if the map is enlarged or reduced, so that the user easily recognizes the character or symbol.
  • Japanese Unexamined Patent Application Publication No. 05-181414 describes a technique that prepares plural pairs of characters and display position data, the characters including names of roads, names of intersections, etc., on a map.
  • the technique displays a name such that characters of the name do not overlap a road display located near the current position.
  • Japanese Unexamined Patent Application Publication No. 05-281903 describes a technique that displays, for example, a name of a location on a map by moving the name outside a predetermined angular range around a travel direction of a vehicle, or in a direction opposite to the travel direction, to a position at which the name does not overlap a mark indicative of a current position.
  • Japanese Unexamined Patent Application Publication No. 08-006496 describes a technique that provides easy viewing of characters and symbols if a map is rotated by 90 degrees, by rotating the characters and symbols by 90 degrees and compressing en characters that are converted into the form of vertical writing.
  • the techniques provide easy viewing of the map.
  • a road width of a road to be displayed is previously defined in map data.
  • the road with the road width is displayed on the basis of the definition.
  • a display of a character or a symbol is effective for the predefined road width.
  • the road width is displayed recognizably, in particular, if the road width is changed in accordance with the actual number of lanes of the road, a display of a name related to the road may overlap the road depending on the width of a line of the road. The user may have difficulty in viewing the display.
  • definition may be previously given such that a display of a related name is changed if a road display is changed.
  • map data has to be entirely updated to reflect the changed display. The update may take time and be troublesome work.
  • JP2001307121 discloses an apparatus which displays landmarks in positions at which they do not overlap a road display.
  • US2005/052413 discloses an apparatus which applies an angular off-set to display labels.
  • the present invention is made to address the disadvantages of the related art, and an object of the present invention is to provide a map display device that can change a display position of road-related information easily and efficiently without entirely updating map data.
  • the present invention provides a map display device according to claim 1.
  • the display position of the road-related information is calculated on the basis of the adjustment data information (shiftwidth) indicative of a distance by which the road-related information stored in associated with the road data is shifted from the road when the map is displayed.
  • the road-related information is displayed on the basis of the calculation result. Accordingly, even if the road width is changed to the road width defined on the basis of the road type and the number of lanes of the road, the display of the road-related information does not overlap the road.
  • the map display can be easily viewed.
  • the display position of the road-related information is determined and the road-related information is displayed at the determined position when the map is displayed.
  • the map data does not have to be entirely updated.
  • the road-related information can be easily and quickly displayed at the optimal position.
  • Fig. 1 is a block diagram showing a configuration of an on-vehicle navigation device 100 having a function of a map display device, as an embodiment for a map display device of the present invention.
  • a storage medium stores map data and guide data.
  • the storage medium that stores such data is a DVD-ROM 1a.
  • hard disk or another storage medium may be used.
  • the map stored in the DVD-ROM 1a is divided into longitude widths and latitude widths with proper sizes depending on scales, for example, 1/12500, 1/25000, 1/50000, and 1/100000.
  • Various objects including roads, buildings, and facilities in the map are stored as sets of coordinates of nodes expressed with the longitude and latitude.
  • the map data includes (1) a road layer having a road list, a node table, an intersection-nodes list, etc., (2) a background layer for displaying roads, buildings, parks, rivers, etc., on a map image, and (3) a characters-and-symbols layer for displaying characters and map symbols to identify names of administrative districts like municipal districts, street names, intersection names, etc.
  • the DVD-ROM 1a also stores road data that expresses shapes of roads that are used for map matching.
  • the road data includes links between shape nodes. Distances between the nodes differ from one another in accordance with the shapes of the roads.
  • An operation unit 2 includes operation buttons and the like for operating a navigation device body 10.
  • the operation unit 2 includes a remote-controller transmitter. A user may operate the navigation device body 10 by using the remote-controller transmitter.
  • a GPS receiver 3 receives GPS signals transmitted from a plurality of GPS satellites; generates GPS data including a longitude and a latitude of a current position of a vehicle, and GPS data including position dilution of precision (position DOP, PDOP) and a horizontal position dilution of precision (HDOP); and outputs the GPS data.
  • position DOP position dilution of precision
  • PDOP position dilution of precision
  • HDOP horizontal position dilution of precision
  • Various sensors 4 include a self-contained navigation sensor, an acceleration sensor, and a steering-angle sensor.
  • the self-contained navigation sensor includes an angle sensor such as a gyro that detects a rotation angle of a vehicle, and a travel distance sensor that generates a pulse every predetermined travel distance.
  • the acceleration sensor detects an operated state of a brake.
  • the steering-angle sensor detects an operated state of a steering wheel.
  • a communication device 5 is, for example, a mobile phone for communication between the user and various service centers.
  • a vehicle information and communication system (VICS) receiver 6 receives information from radio beacons or optical beacons. These beacons are provided at roadsides. The beacons are connected with police offices, road administrators, and an integrated center.
  • VICS vehicle information and communication system
  • a display unit 7 is, for example, a liquid crystal panel.
  • the navigation device body 10 causes the display unit 7 to display a map around a current position of the vehicle, a guide route from a departure place to a destination, a vehicle mark, and other guide information.
  • the display unit 7 includes a touch panel on a screen thereof.
  • the touch panel includes various buttons corresponding to display contents of a displayed screen.
  • the touch panel also serves as an input device to select menus in the form of various buttons.
  • a speaker 8 provides guide information to the user with voice.
  • the navigation device body 10 includes following components.
  • a buffer memory 11 temporarily stores the map data read from the DVD-ROM 1a through the DVD-ROM drive 1.
  • a control unit 12 is a microcomputer including a navigation program. Under the program, the control unit 12 executes various processing including calculating a current position of the vehicle by using a signal output from the GPS receiver 3 and a signal output from the self-contained navigation sensor included in the various sensors 4; reading map data to be displayed from the DVD-ROM 1a through the DVD-ROM drive 1 and providing the read map data to the buffer memory 11; and searching a guide route from a departure place to a destination to meet a search condition determined with the map data in the buffer memory 11.
  • the control unit 12 has a function of a map display control unit.
  • control unit 12 When the control unit 12 causes a screen of the display unit 7 to display a road and a street name related to the road, the control unit 12 adjusts a distance between a display position of the road and a display position of the street name etc., and determines the display positions. Thus, the control unit 12 performs processing for displaying a map that can be easily viewed.
  • a map drawing unit 13 generates a map image by using the map data in the buffer memory 11.
  • An operation screen and mark generating unit 14 generates various menu screens (operation screens) in accordance with operated states, a vehicle position mark, and various marks such as cursors.
  • a guide route storage unit 15 stores the guide route searched by the control unit 12.
  • a guide route drawing unit 16 draws a guide route.
  • the guide route storage unit 15 stores all nodes in the guide route searched by the control unit 12, from the departure place to the destination.
  • the guide route drawing unit 16 reads guide route information from the guide route storage unit 15 when the map is displayed, and draws the guide route with a color and a line width different from those of the other roads.
  • a storage unit 17 is, for example, hard disk.
  • the storage unit 17 stores data for adjusting, for example, a position of a street name with respect to a position of a road displayed on a screen of the display unit 7.
  • a voice output unit 18 supplies the speaker 8 with a voice signal on the basis of a signal from the control unit 12.
  • An image combining unit 19 superposes the various marks and the operation screen generated by the operation screen and mark generating unit 14, and the guide route drawn by the guide route drawing unit 16, on the map image drawn by the map drawing unit 13. The resultant map image is displayed on the display unit 7.
  • Described next is a display of a map image when the widths of roads are changed in accordance with road types by the on-vehicle navigation device 100 with the above configuration.
  • Fig. 2A illustrates an example of a map image 21 that is displayed on the screen of the display unit 7 when the widths of roads are not changed in accordance with the numbers of lanes of the roads.
  • Roads 25, 26, 27, 28, and 29
  • a vehicle position mark 24 indicative of a current position of the vehicle an azimuth mark 22, and a state display section 23 are displayed on the map image 21 in Fig. 2A .
  • the state display section 23 indicates that the vehicle currently travels to the west along the 55th street (W 55TH ST).
  • the roads 25 and 27 have higher-level road types (also referred to as function class, FC) than the road 26.
  • the roads 25 and 27 are displayed with lines thicker than the line of the road 26. If the widths of the roads are not changed in accordance with the numbers of lanes of the roads, the street names (54TH, etc.) are displayed generally at distances from the roads to prevent the street names from overlapping the display of the roads.
  • Fig. 2B illustrates an example of a map image when the widths of roads are changed in accordance with the road types (thus, the roads 25, 26, 27, 28, and 29 are changed to roads 25a, 26a, 27a, 28a, and 29a), as compared with the state in Fig. 2A .
  • the street names are data independent from data of the roads. Even if the widths of the roads are changed, the display positions of the street names are not changed. Thus, a road may overlap a street name depending on the width of the road, or a street name may be too far from a road.
  • Figs. 3A and 3B illustrate an example in which a street name is displayed at a proper position such that a street name does not overlap a road or is not too far from the road when the widths of the roads are changed in accordance with the road types.
  • Fig. 3A is the same figure as Fig. 2A , and illustrates a map image when the widths of roads are not changed in accordance with the numbers of lanes of the roads.
  • Fig. 3B illustrates a map image when the widths of the roads are changed in accordance with the numbers of lanes of the roads, as compared with the map image in Fig. 3A .
  • the street name "FIGUEROA” which overlaps the road in Fig. 2B
  • the street name "HOOVER” which is too far from the road in Fig. 2B
  • Figs. 4A and 4B each illustrate a primary configuration of a road database.
  • Fig. 4A illustrates part of the content of the map database.
  • the map database includes roads and street name information.
  • Fig. 4B illustrates part of a directory structure of information data related to a street name.
  • the road layer in the map data includes road link data, node data, and intersection data.
  • the road link data is data related to roads that connect intersections with one another.
  • the road link data includes node data indicative of longitudes and latitudes of a start point and an end point of a road, a road type (national road, highway, prefectural road, other local road and street), the number of nodes that form a link, a street name, a road width, and the number of lanes of a road, for each link that forms a road.
  • FC0 corresponds to Super Highways
  • FC1 corresponds to Highways
  • FC2 corresponds to Collector Roads
  • FC3 corresponds to Feeder Roads
  • FC4 corresponds to Local Streets.
  • the Road Text Data Type directory includes a Road Information directory and a TEXT directory, and has a Text Center X file and a Text center Y file.
  • the Text Center X file and the Text center Y file respectively indicate an X coordinate and a Y coordinate of the center of a text (street name).
  • the Road Information directory saves data of road information, and has a Function Road Class file and a Number of Lanes file.
  • the Function Road Class file saves a road type
  • the Number of Lanes file saves the number of lanes of a road.
  • the TEXT directory further includes a Text Record directory.
  • the Text Record directory has a String Angle file, a Char Angle file, and a String file.
  • the String Angle file saves an angle of a street name string to be displayed
  • the Char Angle file saves an angle of characters of the street name to be displayed
  • the String file saves a string of the street name to be displayed.
  • FIGUEROA is saved as the string of the street name.
  • Figs. 5A to 5C each illustrate calculation of a display position of a street name.
  • a center line 53 of a road 51 (with a road width of RW1) serves as a reference line of the road 51
  • a center line 54 of a display frame 52 for a street name serves as a reference line for displaying the street name, the center line 54 being parallel to the road 51.
  • the street name is displayed within the display frame 52 for the street name.
  • the XY coordinates of the center of the display is previously defined as shown in Fig. 4B .
  • the X coordinate of the center of the display position of the street name is the same as the defined X coordinate, and the Y coordinate thereof is obtained by adding a shiftwidth SW1 to the Y coordinate of the center line 53 of the road 51.
  • the street name is displayed at a proper position without overlapping the display of the road.
  • the display frame 52 for the street name is a region in which the string of the street name is displayed.
  • the display frame 52 may be displayed or may not be displayed when the map is displayed.
  • Fig. 5B the center line 53 of the road 51 serves as the reference line of the road 51, and a side 55 of the display frame 52 for the street name serves as a reference line for displaying the street name, the side 55 being parallel to the road 51 and being near the road 51. Calculation for the display position of the street name is similar to that in Fig. 5A .
  • the shiftwidth for the street name from the road is the shiftwidth SW1 from the center line 53 of the road 51 to the lower end of the display frame 52 for the street name.
  • a side 56 of the road 51 serves as a reference line of the road 51, the side 56 being parallel to the display frame 52 and being near the display frame 52 for the street name, and the side 55 of the display frame 52 for the street name serves as the reference line of the street name, the side 55 being parallel to the road 51 and being near the road 51.
  • the shiftwidth for the street name from the road is the shiftwidth SW1 from the side 56 of the road 51 to the lower end of the display frame 52 for the street name.
  • the shiftwidth SW1 of the street name does not have to be corrected.
  • the shiftwidth SW1 of the street name does not have to be corrected.
  • Fig. 6 is a table showing a relationship between the number of lanes of a road and a shiftwidth for a display position of a street name for each road type.
  • the table showing this relationship is stored in the storage unit 17.
  • a road width corresponding to the number of lanes and a shiftwidth for a street name in accordance with the road width are defined for each road type. For example, in a case of a road with a function class FC3, if the number of lanes is five or more, it is defined that the road width is 11 dots and the shiftwidth for a street name in this case is 17 dots.
  • Fig. 7 is a flowchart showing exemplary processing for displaying a map around a vehicle position.
  • Fig. 8 is a flowchart showing exemplary processing for calculating a display position of road-related information.
  • step S11 in Fig. 7 a vehicle position is detected by using a signal from the GPS receiver 3.
  • step S12 map data around the vehicle position is acquired.
  • the map data corresponding to a range to be displayed on a screen with a predetermined scale is extracted from map data stored in the DVD-ROM 1a.
  • step S13 a display position of road-related information is calculated. Processing for calculating the display position will be described in more detail below.
  • step S14 a map around the vehicle position including the road-related information at the optimal display position is displayed on the display screen.
  • step S15 it is determined whether a stop instruction is given for the map display. If the stop instruction for the map display is given as a result of that, for example, an engine stops, or the user changes the display, the processing is ended. If no instruction is given, the processing returns to step S11, and continuously performs the processing for displaying the map around the vehicle position.
  • Fig. 8 illustrates the exemplary processing for calculating the display position of the road-related information.
  • step S21 in Fig. 8 data of a road to be displayed and data of road-related information related to the road are acquired.
  • step S22 the number of lanes of the road is detected.
  • the number of lanes is previously stored in part of the map database, as road information data of the map data.
  • step S23 a shiftwidth for the display position of the road-related information corresponding to the number of lanes of the road detected in step S22 is detected.
  • the shiftwidth is previously defined in accordance with the road type and the number of lanes of the road (width), and is stored in the storage unit 17.
  • step S24 the display position of the road-related information is calculated on the basis of the shiftwidth acquired in step S23.
  • the position data is stored in the storage unit 17.
  • step S25 it is determined whether display positions of road-related information have been determined for all roads to be displayed. If the display positions of the road-related information have been determined not for all roads, the processing returns to step S24, and the display positions are continuously calculated. If the display positions for all roads to be displayed have been determined, the processing is ended, and the processing goes to step S14 in Fig. 7 .
  • the display position of the road-related information is calculated by using adjustment data information (shiftwidth) indicative of a distance by which the road-related information stored in association with the road data is shifted from the road.
  • the road-related information is displayed on the basis of the calculation result. Accordingly, even if the road width is changed to a road width defined in accordance with a road type and the number of lanes of the road, the display of the road-related information does not overlap the road. Thus, the map can be easily viewed.
  • the position adjustment data for displaying the road-related information (street name etc.) defined such that the shiftwidth is associated with the road is stored separately from the map data. Hence, the display position of the road-related information is determined when the map is displayed, and the road-related information is displayed at the determined position.
  • the map data does not have to be entirely updated.
  • the road-related information can be displayed at the optimal position easily and quickly.
  • the display position of the road-related information is calculated with reference to the position adjustment data and is displayed every time when the map around the vehicle position is displayed.
  • the map may be displayed, and updated data for the display position of the road-related information may be reflected on the map data. Then, the updated data may be re-used when the map for the same region is displayed. In this case, the calculation for changing the position of the road-related information can be omitted.
  • the road-related information may include an intersection name, a road sign (icon figure indicative of a road number), etc., as long as the information relates to a road.
  • Fig. 9 illustrates an exemplary display of an intersection name and a road sign.
  • Fig. 9 provides an exemplary map display near an intersection 91 where a road 91a (with a road width of RW2) intersects with a road 91b (with a road width of RW3).
  • a balloon-like intersection-name display icon 92 shows an intersection name "ABC intersection" along the road 91a.
  • a reference line of the road 91a is a center line 93 of the road 91a
  • a reference line of the display icon 92 is a side 94 of the display icon 92, the side 94 being parallel to the road 91a that corresponds to the display icon 92 and being near the road 91a.
  • a distance (shiftwidth) SW2 between the center line 93 that is the reference line of the road 91a and the side 94 that is the reference line of the display icon 92 is previously determined.
  • the display position of the display icon 92 is determined with reference to the shiftwidth SW2.
  • a road sign icon 95 is displayed along the road 91b.
  • a reference line of the road 91b is a center line 96 of the road 91b
  • a reference line of the road sign icon 95 is a side 97a of the road sign icon 95, the side 97a being parallel to the road 91b and being near the road 91b, from among sides of a rectangular frame 97 that is a virtual outer frame of the road sign icon 95.
  • a distance (shiftwidth) SW3 between the center line 96 that is the reference line of the road 91b and the side 97a that is the reference line of the road sign icon 95 are previously determined.
  • the display position of the road sign icon 95 is determined with reference to the shiftwidth SW3.

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Navigation (AREA)
  • Instructional Devices (AREA)

Claims (6)

  1. Un dispositif d'affichage de carte qui affiche l'image d'une carte autour de la position d'un véhicule et qui se compose des éléments suivants :
    un support d'affichage (7)
    un premier support de mémorisation (1a) qui conserve des données de cartes, y compris les donnée routières d'une route et le nom d'une rue liée à cette route ;
    un deuxième support de mémorisation (17) qui conserve les données d'ajustement qui indiquent le rapport qui existe entre une position d'affichage des données routières et une position d'affichage du nom de la rue, et qui se caractérise par
    un support de commande d'affichage de carte (12) qui permet de calculer la position d'affichage du nom de la rue qui est lié à la route et se base sur les données d'ajustement de la route individuelle sur un écran du support d'affichage (7) et la largeur de la route, lorsque cette route s'affiche sur l'écran du support d'affichage (7), est déterminée en fonction du nombre de voies de circulation et du type de route et les données d'ajustement correspondent à une distance entre la position d'affichage de la route et la position d'affichage du nom de la rue et sont déterminées en fonction de la largeur de la route.
  2. Le dispositif d'affichage de carte que décrit la revendication 1, si ce n'est que le support de commande d'affichage de carte (12) extrait la distance sous la forme d'une distance entre une ligne de référence pour l'affichage du nom de la rue, en fonction du type de route et de la largeur de la route, et une ligne de référence de la route à partir des données d'ajustement conservées dans le deuxième support de mémorisation (17), et calcule la position d'affichage du nom de la rue en fonction de la distance.
  3. Le dispositif d'affichage de carte que décrit la revendication 2, si ce n'est que la ligne de référence pour l'affichage du nom de la rue est un axe central d'un cadre d'affichage pour une zone dans laquelle vient s'afficher le nom de la rue et cet axe central est parallèle à la route qui correspond au cadre d'affichage.
  4. Le dispositif d'affichage de carte que décrit la revendication 2, si ce n'est que la ligne de référence pour l'affichage du nom de la rue est un côté du cadre d'affichage pour une zone dans laquelle vient s'afficher le nom de la rue, et ce côté est parallèle à la route qui correspond au cadre d'affichage et est le plus proche de la route.
  5. Le dispositif d'affichage de carte que décrit la revendication 3 ou 4, si ce n'est que la ligne de référence de la route est l'axe central de la route.
  6. Le dispositif d'affichage de carte que décrit la revendication 3 ou 4, si ce n'est que la ligne de référence de la route est un côté de la route et que ce côté est parallèle au cadre d'affichage et est le plus proche du cadre d'affichage.
EP10169810.8A 2009-10-21 2010-07-16 Dispositif d'affichage de carte et procédé d'affichage de carte Active EP2317282B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009242055A JP5554045B2 (ja) 2009-10-21 2009-10-21 地図表示装置及び地図表示方法

Publications (3)

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EP2317282A2 EP2317282A2 (fr) 2011-05-04
EP2317282A3 EP2317282A3 (fr) 2014-02-26
EP2317282B1 true EP2317282B1 (fr) 2019-09-04

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US (1) US8504297B2 (fr)
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EP2317282A3 (fr) 2014-02-26
US20110093195A1 (en) 2011-04-21
JP5554045B2 (ja) 2014-07-23
EP2317282A2 (fr) 2011-05-04
US8504297B2 (en) 2013-08-06
JP2011089819A (ja) 2011-05-06

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